AUTHOR=Schmiedl Helena , Köllner Martin G. TITLE=Book Review: The Psychologist's Companion (6th Edition) JOURNAL=Frontiers in Psychology VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2019.00556 DOI=10.3389/fpsyg.2019.00556 ISSN=1664-1078